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Reef Basis Magnesium Liquid 250ml

Sku: CAT108

Key Features

  • Ionically balanced magnesium
  • Liquid based compound
  • Helps to raise levels in the tank
  • For use on Marine and reef aquaria
  • 250ml treats 1040 Gallons


Keeping control of the magnesium level is vital for the health and growth of corals and other invertebrates in a Marine aquarium environment.

Reef Basis Magnesium is a high quality, ionically balanced solution of hydrated magnesium salts and has been designed to safely raise the magnesium level in the tank.

Magnesium is essential for healthy invertebrate growth and helps to regulate the balance between calcium and carbonates.

It contains no acetate, gluconates, polygluconates or other unnecessary organics to pollute your aquarium. It is phosphate and nitrate free.


It is recommended that you maintain a calcium level of between 410 and 450 mg/L (ppm), an alkalinity level of 7 to 11 dKH (2.5 to 4 meq/L), and a magnesium level of 1250 to 1350 mg/L (ppm).

Note: Aquarists keeping SPS corals should consider keeping alkalinity at 7 to no more than 9 dKH (2.5 to 3.21 meq/L). Do not add calcium and buffering (alkalinity) products at the same time. Doing so will cause unnecessary precipitation and possible cloudiness.


250ml treats up to 1040 gallons

Shake well prior to use. Add 1 capful (5 ml) per 20 gallons (100 L) of marine aquarium water 3 to 4 times per week. For best results, measure the magnesium concentration and add as required to maintain the concentration between 1,250 and 1,350 mg/L (ppm).

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